The last version of Xcode compatible with is Xcode 10.1 . While the Mac App Store typically only offers the latest version, you can download Xcode 10.1 directly from the Apple Developer More Downloads page . Compatibility & Requirements Version: Xcode 10.1.
: This is the final version that runs natively on High Sierra without workarounds. It includes Swift 4.2.1 and SDKs for iOS 12.1 , macOS Mojave 10.14.1 , watchOS 5.1 , and tvOS 12.1 . How to Download download xcode for mac os high sierra 10136 work